package com.xc.controller;

import com.google.code.kaptcha.Producer;
import com.xc.enums.SendCodeEnum;
import com.xc.service.NotifyService;
import com.xc.utils.CommonUtil;
import com.xc.utils.JsonData;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;


import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

import static com.xc.enums.BizCodeEnum.CODE_CAPTCHA_ERROR;

/**
 * @author xingchen
 * @create 2021/10/25 16:36
 */
@Api(tags = "通知模块")
@RestController
@RequestMapping("/api/user/v1")
@Slf4j
public class NotifyController {

    @Autowired
    private Producer captchaProducer;

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Autowired
    private NotifyService notifyService;

    /**
     * 图形验证码有效期10分钟
     */
    private static final long CAPTCHA_CODE_EXPIRED = 60 * 1000 * 10;

    /**
     * 获取图形验证码
     *
     * @param request
     * @param response
     */
    @ApiOperation("获取图形验证码")
    @GetMapping("captcha")
    public void getCaptcha(HttpServletRequest request, HttpServletResponse response) {

        String captchaText = captchaProducer.createText();
        log.info("图形验证码：{}", captchaText);

        //存储
        redisTemplate.opsForValue().set(getCaptcha(request), captchaText, CAPTCHA_CODE_EXPIRED, TimeUnit.MILLISECONDS);

        BufferedImage bufferedImage = captchaProducer.createImage(captchaText);
        ServletOutputStream outputStream = null;
        try {
            outputStream = response.getOutputStream();
            ImageIO.write(bufferedImage, "jpg", outputStream);
            outputStream.flush();
            outputStream.close();
        } catch (IOException e) {
            log.error("获取图形验证码异常:{}", e);
        }
    }


    /**
     * 发送验证码
     * 1、匹配图形验证码是否正常
     * 2、发送验证码
     * <p>
     * 支持手机号、邮箱发送验证码
     *
     * @param to
     * @param captcha
     * @return
     */
    @ApiOperation("发送邮箱注册验证码")
    @GetMapping("send_code")
    public JsonData sendRegisterCode(@RequestParam(value = "to") String to,
                                     @RequestParam(value = "captcha") String captcha,
                                     HttpServletRequest request) {
        String key = getCaptcha(request);
        //从缓存中获取key
        String cacheCaptcha = redisTemplate.opsForValue().get(key);

        //匹配图形验证码是否一致
        if (captcha != null && cacheCaptcha != null && captcha.equalsIgnoreCase(cacheCaptcha)) {
            //成功
            redisTemplate.delete(key);
            JsonData jsonData = notifyService.sendCode(SendCodeEnum.USER_REGISTER, to);
            return jsonData;
        } else {
            //失败
            return JsonData.buildResult(CODE_CAPTCHA_ERROR);
        }

    }

    /**
     * 获取缓存的key
     *
     * @param request
     * @return
     */
    public String getCaptcha(HttpServletRequest request) {

        String ip = CommonUtil.getIpAddr(request);
        String userAgent = request.getHeader("User-Agent");

        String key = "user-service:captcha:" + CommonUtil.MD5(ip + userAgent);

        log.info("ip={}", ip);
        log.info("userAgent={}", userAgent);
        log.info("key={}", key);

        return key;

    }

}
